The grouping feature allows you to organize shapes in group, so you can manipulate related shapes together (select, deselect, move, align and resize) more easily. Groups can be formed on shapes, and you can even form a new group on top of existing groups.
To group shapes, select shapes in diagram, right-click on the selection and select Grouping
from the popup menu.
Or you can press the hotkey Ctrl + G to group selected shapes.
To ungroup shapes, select grouped shapes in diagram, right-click on the selection. If you want to ungroup the top-most grouping only, select Grouping
; or if you want to ungroup all levels of grouping, select Grouping
> Ungroup All